Exhaust-muffler.



PATENTED DEC. 24, 1907.

E. J. GULIGK. EXHAUST MUFFLER.

APPLICATION FILED FEB. 13, 1901.

. a EDWARD J. cuLIcK, OF MISHhWAKA, INDIANA.

EXHAUST-MUFFLER.

Specification of Letters Patent."

Patented Dec. 24, 1907.

u Application filed February 13} 1907; Serial No. 357,153

To all whom it may concern:

Be it known that I, EDWARD J. GULIcK, a

I citizen of the United States, residing at Mish:

, sidera out forms, a that is to pheric pressure and are then expelled from awaka, in the county of St. Joseph and State of Indiana, have invented certain new and useful I which the following is a specification.

The invention is primarily adapted for use in connection with gasolene engines where the exhaust from the cylinder is expelled at a pressure between two and three times an atmos here, and which would result in conle noise if it were not for the use of a mufller in connection therewith. Although there are many rhufliers'of difi'ertheir object is all the same, and break-up expelling them through perforations in an ex aust tube, and permitting them to expand to nearly atmospheric pressure before caving the muflier or the exhaust tube. As the perforations prevent the free expansion of the exhaust gases, there is consequently a back pressure u on the engine as well as a detonation whic is due to the gases, after each ex losion, leaving the mufiler'together althoug in a reduced form. 1

My invention has for its objects to provide a muffler wherein the exhaust gases are broken up and expanded, to nearly'atmosthe muffler in a progressive form, making a continuous streamtherefrom.

The invention consists in general of a main chamber in which the exhaust gases are discharged from the cylinder and a series of auxiliary chambers communicating with the main chamber by perforations that differ in number or size, and the auxiliary chambers communicating with each other whereby the exhaust gases pass from the mam into the auxiliary chambers and progressively from one auxihary chamber to the next until the discharge port is reached in one of the auxiliary chambers whereupon it passes into the outside atmosphere. I

In the accompanying drawing Figure 1 is a side elevation of my device: Fig. 2 is a longitudinal sect-ion of Fig. 1; Fig. 3 is an end elevation of Fig. 1 with parts in section; and Fig. 4 is a cross-section on line 44 of Fig. 1.

Referring now more particularly to the mprovements in Exhaust Mufliers, of

the exhaust gases by partition 16 extends the full length of chamber drawing, and to the construction in general, 5 represents aninner casing, cylindrical in form, and 6 represents an outer casing inclosing the inner casing' and being properly held apart by the heads 7 and 8, which are pr0- vided with the inwardly extending circumferential flanges 9 and 10, the inner casing surrounding the flange 10 while the outer casing fits within the flange 9, the ends of the cylinders or casings'being closed by the heads which are held together by the stay rods 11 and the bolts 12 at each end thereof. The head 7 is provided with an annular intake port 13 opening directly into the inner casing and screw threaded at 14 to form a suitable connection to the discharge pipe from the cylinder, while the head 8 is provided with an annular exhaust opening 15, for a purpose hereinafter described. Interposed between the outer and inner cylinders or casings are a series of partitions 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26 and 27 that run longitudinally of the casings and form the auxiliary chambers or compartments 16, 17 18 19, 20, 21 22 23 ,24 25 26 and 27 Tlllle, t e inner casing abutting against the heads thereof; the next'partition. 1-7 to the right (Fig. 4) terminates slightly short of the head 7, as seen in Fig. 2. 18 terminates short of the head 8 although abutting against the head 7, and so the partitions alternate in abutting and terminating short of the different heads entirely around the inner casing so as to form a continuous zig-za passage from the partition 16 through the di erent auxiliary chambers 16*, 17 etc., until the chamber 27 is reached which is provided with an exhaust port 28. The partitions in the form herein shown have their edges bent inwardly, as shown at 29, and riveted to the outer and inner casin s. The inner casing is provided with a series of perforations 3Q that open into the auxiliary chambers, the greatest number of perforations opening into the auxiliary chamber 16 and the number thereof adually diminishing in each successive auxi 'ary chamber, until the auxiliary chamber having the least number of perforations is chamber 2 7, which is provided wit-h the exit port 28. It is not necessary that there be a definite number of perfo- The next partition ing the greatest number of perforations will l auxiliary chambers.

- st age immediately rations, nor is it necessary that they be of any specific size as they might vary according to the type of engine that the muffler was 1 used in connection with, but in the ordinary form the area of the perforations would be sufiicient to admit all the exhaust gases from one discharge of the engine directly into the 1 Referring now to what is termed the cutout on a muffler, 31 represents a valve adaptl ed to close the exhaust port 15, which is provided with a valve stem 32 slidably mounted through the plate 33 that is secured to the l lugs 34, that are formed integral with the head 8 and are so spaced as to form the pas- 1 sages 34* through which the exhaust gases are discharged. A spring 35, the tension of which is normally outward to seat the valve, is mounted on the outer end of the valve stem and is held against the plate 33 by the block 36 that is preferably formed integral with the lever arm 37 and with which the valve stem has a threaded connection. Thel lever arm is pivoted at 38 to a lug 39 formed integral with the head 8. T he lever arm is provided with an eye 40 for connecting it with the operating means, and the action is i nearest the port 28 is first to press the valve inward whereby the ex- 1 haust gases in the inner chamber may be instantly released without passing through the perforations, it being understood, however,

that the cut-out as herein shown is not part of my invention and is such as is commonly employed upon muffiers.

Referring now more especially to the movement of the discharged gases, we will assume that an explosion has occurred in the cylinder and the gases are forced through a discharge pipe connected thereto and pass into the inner chamber, the valve of the cutout being closed, the gases being in a heated expand and pass through the perforations 30 in the inner cylinder to expelled through the discharge port 28. The exhaust gases that pass into the auxiliary chamber 22*- would pass into the auxiliary chamber 23 and so on around to the chamber 27, while the exhaust gases discharged into the chamber 27 -would immediately pass out. It can be thus readily seen that there is a progressive movement of the exhaust gases from one auxiliary chamber to another and so on through all the auxiliary chambers. On account of the numerous partitions used to construct the auxiliary chambers, the cooling of the gasesis accom- I plished because the partitions are directly connectel to the outer casing which is surrounded by the free air, so that the ases will be practically at the same atmosp eric pressure as the free air when discharged throu h the port 28. It will be readily seen that the discharged ases do not leave the muffler at one time, hut are broken up and expelled into the numerous auxiliary chambers which in in such a manner chamber is not expelled through the port 28 until the discharge from the chamber next expelled, thereby causing gases to be expelled from the muffler in a continuous stream rather than in a body, which causes the heavy detonations.

I claim:

BISGS are exthe auxiliary chambers. The pressure being equal. throughout the whole inner chamber the gases will not pass into' the auxiliary chambers in equal amounts due to each auxilsaid auxiliary chambers and are expelled through said discharge port, substantially as described.

2. In an exhaust muffier an outer and an iary chamber having a different number of perforations that communicate with the main chamber. The chamber therefore havreceive the largest volume of gas first, that chamber being 16. The gases will pass through the auxiliary chamber 16 down to the end of the partition 17, circulating around the end thereof back the full lengthof the auxiliary chamber 17, around the end inner casing, a series of auxiliary chambers formed between said casin s and communicating with each other at their ends to form a continuous zi zag passage through all of said auxiliary chambers, each of said auxiliary chambers communicating with said inner casing, a port in said inner casing for admitting exhaust gases therein and a port in one of said auxiliary chambers throu h which the exhaust gases are expelled, su

of the partition 18, then through the next auxiliary chamber 18 and so on around through the various auxiliary chambers, so referring to Fig. 4 the exhaust gases would pass from chamber 16 to 17 3 etc., until chamber 27 was reached, where they would be l l v I l stantially as described.

3. In an exhaust muffler, the combination of an outer casing and an inner casing, a series of partitions radially interposed between said casings and secured thereto, to form auxlhary chambers, each of said auxiliary cham- 1. An exhaust mufiier comprising a main turn distribute the discharge that the discharge from one series of auxiliary c ambers surbers communicating with said inner casing and are ex elled throu h said discharge port, by (13;)II1II1U1l11i0&iOI1S1-)Of unequal area, .said esubstantiaiiy as descri ed. auxi 'a 0 am ers ein in communication at theii znds with each 01; er, and a discharge P f GULICK V 5 Bert in one of said auxiliary chambers Where- VVisnesses:

y exhaust gases discharged into said main LEROY T. HAURER, chamber pass into said auxiliary chambers GEORGEW. HOYT. 

